Energy efficiency emergence of high-speed train operation and systematic solutions for energy efficiency improvement

Abstract

Different from the concept of energy consumption, the energy efficiency reflects the efficiency of using energy resource and the service-oriented business philosophy of railway transportation enterprises. The energy efficiency of high-speed train operation is mainly embodied in the operation stage of railway transportation system, but involves a number of factors during the whole life cycle of railway transportation system. Based on the above understanding, the principle of making gradual and orderly progress is followed to broaden our research vision in space and time so that the global energy efficiency of high-speed train operation can be better studied. Firstly, we describe in detail the definition of the operational energy efficiency of high-speed train. Then the energy efficiency model of high-speed train operation is established to reveal the energy efficiency emergence mechanism of high-speed train operation. The simulation is carried out to analyze the complex influence of train light-weighting, control scheme, load ratio, and different inter-station distance on the operational energy efficiency of high-speed train moving through a block section. The proportion of the braking energy consumption of high-speed train with the non-regenerative braking mode is calculated in real time so that the maximum amount of available regenerative braking energy can be known for the better design of the regenerative energy recycling system in the future. This study can help to get the systematic solutions to further improve the operational energy efficiency of all in-service high-speed trains.